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Derive the expression for emf induced in...

Derive the expression for emf induced in a straight conductor moving perpendicular to a uniform magnetic field.

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Let .PQ. represent a conductor moving with a speed .v. at right angles to the magnetic flux density .B. pointing perpendicular to the sheet of paper and pointing towards the paper. Let RQ = x be the distance covered by the conductor.
Magnetic flux `phi_(B)` = blx
`epsilon=-Bl(dx)/(dt)`
But `-(dx)/(dt)=v`
`therefore epsilon =Blv`
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